St. Eleutherius of Nicomedia (died 303) was a soldier who was martyred under Diocletian. He was accused of trying to burn the palace of Diocletian. He was burned to death after being tortured alongside his companions. A large number of Christians were martyred alongside Eleutherius through various means, including fire and drowning. His feast day is October 2.
In popular culture St. Eleutherius of Nicomedia is one of the saints that appears to come to life to chastise Reverend Lovejoy in the season 8 episode of The Simpsons, "In Marge We Trust".
References
Sources saints.sqpn.com St. Eleutherius - Saints & Angels - Catholic Online